mksh shares bash.bashrc which has syntax error in [[ $TERM =~ xterm* ]] on
Leap15 and TW.
mksh: /etc/mkshrc[140]: syntax error: unexpected operator/operand '=~'

If this test is trying to match xterm* but NOT match anything with a prefix
before xterm (such as screen.xterm-256color), then it should have been [[ $TERM
= xterm* ]] but with Leap15, TW, and current git code the [[ $TERM =~ xterm* ]]
will match anything with "xterm" in its name.

If we ARE trying to match anything with "xterm" in its name then it should be
[[ $TERM = *xterm* ]] which has same result as the current code without
breaking some shells.

As far as I can tell, this syntax is supported by all shells that read this
file, although maybe some have different glob pattern matching behavior? Bash,
(ba)sh, Dash, ksh93, mksh, and lksh seemed to return the same behavior.

https://github.com/openSUSE/aaa_base/pull/58 
(sorry, I know this should have been a request on osc or something)
--------
@@ -137,7 +137,7 @@ case "$-" in
         # addition needs to have "%w" in the "tabs" setting, ymmv for
         # other console emulators.
         #
-        if [[ $TERM =~ xterm* ]] ; then
+        if [[ $TERM = *xterm* ]] ; then
         _tsl=$(echo -en '\e]2;')
         _isl=$(echo -en '\e]1;')
         _fsl=$(echo -en '\007')

--------